Valve mechanism for hybrid engine, valve mechanism, hybrid engine and vehicle

Abstract

The invention discloses an air valve mechanism and an air distribution mechanism for a hybrid engine, the hybrid engine and a vehicle, and relates to the technical field of engine air distribution mechanisms, the air valve mechanism for the hybrid engine comprises an air valve, an air valve spring and an air valve transmission set, the air valve spring and the air valve transmission set are arranged on the air valve, and the air valve extends in the axial direction; the valve transmission set comprises a cam shaft and a tappet, the tappet is arranged between the cam and the valve, and the cam shaft abuts against the tappet. According to the valve mechanism for the hybrid engine, through the arrangement that the cam shaft is combined with the tappet, the structure can be simplified, the occupied space can be reduced, and cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of engine valve train technology, and particularly to a valve mechanism for a hybrid engine, a valve train using the valve mechanism, a hybrid engine using the valve train, and a vehicle using the hybrid engine. Background Technology

[0002] Currently, the valve train mechanisms of hybrid-specific engines independently developed by Chinese vehicle engine and engine manufacturers still use the layout of traditional gasoline engine engines, which has problems such as large space occupation and high cost. For example, the valve train mechanism of a gasoline engine uses a layout of double overhead camshaft + rocker arm + hydraulic tappet, which is relatively complex and occupies a large space. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in the related art. To this end, one object of this invention is to provide a valve mechanism for a hybrid engine that, through the arrangement of the camshaft and tappets, simplifies the structure, reduces the occupied space, and facilitates cost reduction.

[0004] Another object of the present invention is to provide a valve train mechanism, including the aforementioned valve mechanism.

[0005] Another object of the present invention is to provide a hybrid engine including the aforementioned valve train.

[0006] Another object of the present invention is to provide a vehicle including the aforementioned hybrid engine valve train.

[0007] A valve mechanism for a hybrid engine according to an embodiment of the present invention includes: a valve, a valve spring disposed on the valve, and a valve drive assembly, wherein the valve extends axially; the valve drive assembly includes a camshaft and a tappet, wherein the tappet is disposed between the camshaft and the valve, and the camshaft abuts against the tappet.

[0008] According to an embodiment of the present invention, the valve mechanism for a hybrid engine, through the arrangement of the camshaft and tappets, can simplify the structure, reduce the occupied space, and help reduce costs.

[0009] In addition, the valve mechanism for a hybrid engine according to the above embodiments of the present invention may also have the following additional technical features: In some examples of the present invention, the tappet includes a housing and a valve retainer pin, the camshaft abuts against the outer side of the housing, the valve retainer pin is disposed on the inner side of the housing, and the valve retainer pin and the valve are arranged axially opposite to each other, with the valve passing through the valve retainer pin.

[0010] In some examples of the present invention, the tappet further includes a base and a plunger, the plunger abutting against the valve inside the housing, the base being disposed between the plunger and the housing and forming a high-pressure oil chamber therebetween with the plunger, and a low-pressure oil chamber being formed between the housing and the base and / or the plunger.

[0011] In some examples of the present invention, the tappet further includes a first elastic element, an abutment element, and a one-way conduction assembly. The first elastic element abuts between the base and the plunger. The abutment element includes a receiving portion and a connecting portion. The receiving portion is disposed inside the first elastic element, and the connecting portion abuts axially between the first elastic element and the base. The one-way conduction assembly is disposed within the receiving portion. The base has an opening communicating with the high-pressure oil chamber and the low-pressure oil chamber. The one-way conduction assembly can openably close the opening.

[0012] In some examples of the present invention, the receiving portion is cylindrical, the top periphery of the receiving portion is connected to the connecting portion, and the connecting portion extends in an arc shape in a direction away from the receiving portion; the one-way conduction assembly includes a one-way valve and a second elastic member, one end of the second elastic member abuts against the one-way valve along the axial direction, and the other end abuts against the inner bottom wall of the receiving portion, and the one-way valve is axially opposite to the opening.

[0013] In some examples of the present invention, the tappet further includes a baffle, and the tappet further includes a baffle and a retaining ring. The baffle is sleeved on the outer peripheral wall of the plunger, and the outer peripheral wall of the plunger is provided with a groove. A portion of the retaining ring is disposed in the groove, and another portion protrudes from the peripheral wall of the plunger so as to be axially opposite to the baffle.

[0014] In some examples of the present invention, the valve mechanism further includes a valve lock block and a valve spring seat, the valve lock block being disposed on the valve and the valve passing through the valve spring seat.

[0015] According to an embodiment of the present invention, a valve train for a hybrid engine includes a plurality of the aforementioned valve mechanisms, at least one of which is used for intake and the other for exhaust.

[0016] The valve train mechanism for a hybrid engine according to embodiments of the present invention can simplify the structure of the valve train mechanism, thereby reducing the space occupied by the valve train mechanism, which is beneficial to reducing design redundancy and reducing costs.

[0017] The hybrid engine according to an embodiment of the present invention includes the aforementioned valve train.

[0018] According to embodiments of the present invention, by applying the aforementioned valve train mechanism in the hybrid engine, the internal space of the hybrid engine can be optimized, and costs can be reduced.

[0019] The vehicle according to an embodiment of the present invention includes the aforementioned valve train.

[0020] According to embodiments of the present invention, by applying the aforementioned hybrid engine in a hybrid engine, the vehicle's interior space can be optimized, and costs can be reduced. Attached Figure Description

[0021] Figure 1 These are schematic diagrams of the valve mechanism in some embodiments of the present invention; Figure 2 This is a partial structural schematic diagram of the valve mechanism in some embodiments of the present invention (showing the specific structure of the tappet); Figure 3 This is a schematic diagram of the gas distribution mechanism in some embodiments of the present invention.

[0022] Figure label: 1000. Valve train; 100. Valve mechanism; 10. Valve; 11. Valve spring; 12. Camshaft; 20. Tappet; 21. Housing; 22. Valve retainer pin; 23. Base; 203. Opening; 24. Plunger; 201. High-pressure oil chamber; 202. Low-pressure oil chamber; 25. First elastic element; 261. Receiving part; 262. Connecting part; 271. One-way valve; 272. Second elastic element; 28. Baffle; 29. ​​Retaining ring; 40. Valve lock block; 50. Valve spring seat. Detailed Implementation

[0024] Currently, the hybrid-specific engines independently developed by Chinese vehicle engine and engine manufacturers still use the valve train layout of traditional gasoline vehicle engines, which has the following shortcomings: 1. Large space occupation: In related technologies, the valve train of a gasoline engine uses a layout of overhead double camshaft + rocker arm + hydraulic tappet, which occupies a large space. Hybrid vehicles need to simultaneously carry an engine, motor and battery, requiring high space utilization and urgently needing a design solution that can leave more space.

[0025] 2. High cost: In related technologies, the valve train of a fuel engine generally has two camshafts, two sets of valve mechanisms, and at least one timing adjustment system, which is relatively expensive. Nowadays, the automotive market is shifting to competition for existing market share, and more low-cost solutions are needed.

[0026] 3. High performance redundancy: In related technologies, the design of internal combustion engines generally targets speeds above 5500 rpm, and may exceed 6000 rpm. Because the operating conditions of the valve train deteriorate rapidly starting at 6000 rpm, traditional internal combustion engine valve trains have a high design redundancy and are increasingly unable to meet emission requirements. However, hybrid engines generally operate in a low-speed, high-thermal-efficiency range, and their performance requirements are far below the current design performance limits.

[0027] Therefore, this application proposes a valve mechanism 100 for a hybrid engine, using a structure of camshaft 12 combined with tappets 20. Compared to the rocker arm drive structure in related technologies, this reduces the space occupied by the valve mechanism 100 or the valve train 1000. Furthermore, this invention also proposes a valve train 1000 for a hybrid engine, including multiple valve mechanisms 100 as described above. These valve mechanisms 100 include a one-to-one corresponding intake valve mechanism 100 and an exhaust valve mechanism 100. One intake valve mechanism 100 and one exhaust valve mechanism 100 can construct a set of camshafts, corresponding to one engine cylinder. Compared to the related structures of two camshafts 12 and two sets of valve mechanisms 100 in a fuel engine, the valve train 1000 for a hybrid engine in this application has a simpler structure with one camshaft 12 and one set of valve mechanisms 100, occupying less space and at a lower cost.

[0028] When the valve mechanism 100 or valve train 1000 of this application is applied to an engine, especially to a hybrid engine, although it will reduce the upper limit of engine performance, it can meet the performance requirements of the hybrid engine and meet emission requirements.

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] Combination Figures 1 to 3 According to an embodiment of the present invention, a valve mechanism 100 for a hybrid engine includes: a valve 10, a valve spring 11 disposed on the valve 10, and a valve drive assembly, wherein the valve 10 extends axially; the valve drive assembly includes a camshaft 12 and a tappet 20, wherein the tappet 20 is disposed between the camshaft and the valve 10, and the camshaft 12 abuts against the tappet 20.

[0031] Specifically, when the valve mechanism 100 operates, the camshaft 12 is energized and rotates clockwise, at which point the tappet 20 can be considered a rigid element. The cam on the camshaft 12 is always in contact with the tappet 20 housing 21. When the camshaft 12 rotates to a certain angle, the tappet 20 and valve 10 are pushed by the cam. The tappet 20 and valve 10 are constrained, having only a degree of freedom along the axis, and therefore can only move downwards. The valve 10 remains open until the maximum valve lift. During this process, the valve 10 drives the valve spring 11 to move together; the bottom of the valve spring 11 is fixed and therefore compressed. As the camshaft 12 continues to rotate, the valve 10 and tappet 20 are moved upwards under the action of the valve spring 11 until the valve 10 closes, starting the next cycle.

[0032] According to an embodiment of the present invention, the valve mechanism 100 for a hybrid engine, through the arrangement of the camshaft 12 and tappets 20, can simplify the structure, reduce the occupied space, and help reduce costs.

[0033] Specifically, by using an overhead single camshaft 12 and hydraulic tappets 20, the space occupied by the valve train 1000 is reduced. In addition, the cost is greatly reduced by using only one camshaft 12, one valve mechanism 100, and a valve train 100 with no timing adjustment system or only one timing adjustment system.

[0034] Optionally, the tappet 20 can be a small hydraulic clearance adjuster with a fixed valve type 10.

[0035] Combination Figure 1 and Figure 2 In some embodiments of the present invention, the tappet 20 includes a housing 21 and a valve retaining pin 22. The camshaft 12 abuts against the outer side of the housing 21, and the valve retaining pin 22 is located on the inner side of the housing 21. The valve retaining pin 22 and the valve 10 are arranged axially opposite to each other, and the valve 10 passes through the valve retaining pin 22. Thus, when the valve 10 is connected to the tappet 20, the valve 10 can be directly inserted into the valve retaining pin 22, thereby facilitating assembly. Specifically, the valve retaining pin 22 can be located at one end of the housing 21 or at the bottom of the housing 21, so that the valve 10 can be inserted into the valve retaining pin 22 axially.

[0036] Combination Figure 2In some embodiments of the present invention, the tappet 20 further includes a base 23 and a plunger 24. The plunger 24 abuts against the valve 10 inside the housing 21. The base 23 is disposed between the plunger 24 and the housing 21, forming a high-pressure oil chamber 201 between the plunger 24 and the housing 21. A low-pressure oil chamber 202 is formed between the housing 21 and the base 23 and / or the plunger 24. Specifically, the high-pressure oil chamber 201 can transmit power to open the valve 10, achieve automatic clearance compensation, and provide buffering and protection during the operation of the valve mechanism 100. The low-pressure oil chamber 202 can be used to replenish engine oil and establish a hydraulic foundation.

[0037] Combination Figure 2 In some embodiments of the present invention, the tappet 20 further includes a first elastic element 25, an abutment member, and a one-way conduction assembly. The first elastic element 25 abuts between the base 23 and the plunger 24. The abutment member includes a receiving portion 261 and a connecting portion 262. The receiving portion 261 is disposed inside the first elastic element 25, and the connecting portion 262 abuts axially between the first elastic element 25 and the base 23. The one-way conduction assembly is disposed within the receiving portion 261. The base 23 has an opening 203 communicating between the high-pressure oil chamber 201 and the low-pressure oil chamber 202. The one-way conduction assembly can openably close the opening 203. When the end face of the valve 10 tends to move away from the top surface of the plunger 24, the first elastic element 25 pushes the plunger 24, causing the pressure in the high-pressure oil chamber 201 to drop. The unidirectional conduction component is located in the high-pressure oil chamber 201 and can realize unidirectional conduction from the low-pressure oil chamber 202 to the high-pressure oil chamber 201, so that the oil in the low-pressure oil chamber 202 can enter the high-pressure oil chamber 201 through the opening 203.

[0038] In some embodiments of the present invention, the receiving portion 261 is cylindrical, and the top periphery of the receiving portion 261 is connected to the connecting portion 262, which extends in an arc shape away from the receiving portion 261; the one-way conduction assembly includes a one-way valve 271 and a second elastic member 272, one end of the second elastic member 272 abuts against the one-way valve 271 along the axial direction, and the other end abuts against the inner bottom wall of the receiving portion 261, and the one-way valve 271 is opposite to the opening 203 along the axial direction.

[0039] Specifically, the receiving portion 261 of the abutment can form a receiving cavity for accommodating the unidirectional conduction component, and the connecting portion 262 extends outward to connect with the first elastic member 25. The connecting portion 262 extends in an arc shape, which can better fit with the end face of the first elastic member 25, such as a spring, thereby improving the stability of connection and transmission.

[0040] Therefore, the abutment can accommodate a unidirectional conduction component, and the second elastic element 272 in the unidirectional conduction component can abut against the inner side of the abutment, and the first elastic element 25 can also abut against the abutment, thereby realizing the elastic support of the first elastic element 25 on the abutment and the elastic support of the first elastic element 25 on the unidirectional conduction component.

[0041] Combination Figure 2 In some embodiments of the present invention, the tappet 20 further includes a baffle 28, a retaining ring 29, and a retaining plate 28. The baffle 28 is sleeved on the outer peripheral wall of the plunger 24, and the outer peripheral wall of the plunger 24 is provided with a groove. A portion of the retaining ring 29 is disposed in the groove, and another portion protrudes from the peripheral wall of the plunger 24 so as to be axially opposite to the baffle 28. The axially opposite relationship between the retaining ring 29 and the baffle 28 can limit the axial movement of the plunger 24 to ensure the stability of the plunger 24 during operation and prevent the plunger 24 from dislodging.

[0042] Specifically, the baffle 28 is sleeved on the outer periphery of the plunger 24, and the baffle 28 and the plunger 24 can be an interference fit. This improves the stability of the connection, ensuring the limiting effect of the baffle 28 on the retaining ring 29, and also simplifies the assembly structure. The retaining ring 29 is sleeved on the outer periphery of the plunger 24 and partially embedded in the groove. The groove can fix the retaining ring 29, making it easy to install. The retaining ring 29 is relatively stable after installation, which can improve the limiting effect. The radially or circumferentially protruding part of the retaining ring 29 can interfere with the baffle 28 axially, thereby achieving the limiting effect.

[0043] Combination Figure 1 and Figure 2According to an embodiment of the valve mechanism 100 of the present invention, due to thermal effects and mechanical vibration, a gap always occurs when the cam pushes the valve 10. Therefore, a tappet 20 that can spontaneously eliminate the gap is needed to prevent wear on the valve 10. The tappet 20 works as follows: Initially, the tappet 20 is empty. When the engine starts, engine oil enters the low-pressure oil chamber 202 through the oil hole on the housing 21. At this time, the high-pressure oil chamber 201 contains air. Under the action of the pressure difference, the one-way valve 271 opens. Engine oil enters the high-pressure oil chamber 201 from the low-pressure oil chamber 202 through the drain hole on the base 23. The one-way valve 271 closes when the pressures of the low-pressure oil chamber 202 and the high-pressure oil chamber 201 are balanced. The valve 10 is fixed by the valve retaining pin 22 to prevent surging. When valve 10 compresses plunger 24 and the first elastic element 25, the pressure in high-pressure oil chamber 201 rises rapidly. However, under the action of one-way valve 271 and the second elastic element 272, the oil in high-pressure oil chamber 201 cannot flow back to low-pressure oil chamber 202 through the drain hole. When the pressure in high-pressure oil chamber 201 is too high, a small amount of oil will flow back to high-pressure oil chamber 201 along the gap between plunger 24 and base 23, ensuring that high-pressure oil chamber 201 will not be damaged due to excessive pressure. When the end face of valve 10 tends to move away from the top surface of plunger 24, the first elastic element 25 will push plunger 24, causing the pressure in high-pressure oil chamber 201 to drop. If the pressure in high-pressure oil chamber 201 is lower than that in low-pressure oil chamber 202, one-way valve 271 will open and repeat the oil replenishment process. During this process, retaining ring 29 will prevent plunger 24 from detaching from the restraint of baffle 28. The above principle ensures that the end face of valve 10 can always be in close contact with the top surface of plunger 24.

[0044] Combination Figure 1 In some embodiments of the present invention, the valve mechanism 100 further includes a valve lock block 40 and a valve spring seat 50. The valve lock block 40 is disposed on the valve 10, and the valve 10 passes through the valve spring seat 50. Specifically, when the valve mechanism 100 is in operation, the camshaft 12 is energized and rotates clockwise. At this time, the tappet 20 can be considered a rigid element. The cam on the camshaft 12 is always in contact with the tappet 20 housing 21. When the camshaft 12 rotates to a certain angle, the tappet 20 and the valve 10 are pushed by the cam. The tappet 20 and the valve 10 are constrained, with only the degree of freedom along the axis, and therefore can only move downwards. The valve 10 remains open until the maximum valve lift. During this process, the valve 10 drives the valve lock block 40, the valve spring seat 50, and the valve spring 11 to move together. The bottom of the valve spring 11 is fixed and therefore compressed. As the camshaft 12 continues to rotate, the valve 10 and tappet 20 will be displaced upward by the valve spring 11 until the valve 10 closes and the next cycle begins.

[0045] According to an embodiment of the present invention, a valve train 1000 for a hybrid engine includes a plurality of the aforementioned valve mechanisms 100, at least one of which is used for intake and the other for exhaust. Specifically, the plurality of valve mechanisms 100 includes a one-to-one corresponding valve mechanism 100 for intake and a valve mechanism 100 for exhaust. One intake valve mechanism 100 and one exhaust valve mechanism 100 can be configured to form a set of scavenging cams, corresponding to one engine cylinder.

[0046] According to the embodiments of the present invention, the valve train 1000 for a hybrid engine can simplify the structure of the valve train 1000, thereby reducing the space occupied by the valve train 1000, which is conducive to reducing design redundancy and reducing costs.

[0047] Combination Figure 1 and Figure 3 According to a specific embodiment of the present invention, the valve train 1000 comprises eight valve mechanisms 100, of which four are intake mechanisms and four are exhaust mechanisms. Adjacent intake and exhaust cams are referred to as a set of scavenging cams, corresponding to one engine cylinder. This design has four sets of scavenging cams and can be used in a four-cylinder inline four-stroke engine. Figure 3 With the cam phase in its initial state, the phase difference between each set of scavenging cams is n90° (n=1,2,3). This phase difference can be used to adjust the engine's firing order. Within a set of scavenging cams, the exhaust cam phase is 90° ahead of the intake cam phase to meet the timing requirements of a four-stroke engine. The valve lift can be controlled by designing the cam wrap angle and lift.

[0048] The hybrid engine according to an embodiment of the present invention includes the aforementioned valve train 1000. By applying the aforementioned valve train 1000 in the hybrid engine, the internal space of the hybrid engine can be optimized, and the cost can be reduced.

[0049] The vehicle according to an embodiment of the present invention includes the aforementioned valve train 1000, and is suitable for hybrid engines, meeting their requirements for low cost, miniaturization, low performance, and emission regulations.

[0050] Optionally, the valve train 1000 of this application can also be used with a variable timing adjustment system and a variable valve lift adjustment system, and can also be adapted to three-cylinder and two-cylinder engines by adjusting the number and phase of the valve 10 cams.

[0051] For example, in practical applications, according to the valve train 1000 layout of this application, one camshaft 12, one valve mechanism 100, and no timing adjustment system or only one timing adjustment system are used; while in related technologies, the engine valve train 1000 layout has two camshafts 12, two valve mechanisms 100, and at least one timing adjustment system. In this application, the valve train 1000 reduces one camshaft 12, one valve mechanism 100, and at least one timing adjustment system, which can reduce the unit cost by approximately 220 yuan. In addition, the valve train 1000 of this application uses only one camshaft 12, which can reduce the overall width of the engine, in line with the current research direction of hybrid engine miniaturization; furthermore, the engine cylinder is changed from four valves 10 to two valves 10, reducing performance redundancy, meeting emission requirements, and the size of components such as cylinders, pistons, and connecting rods can be further reduced, which is beneficial to the miniaturization of hybrid engines.

[0052] According to embodiments of the present invention, by applying the aforementioned hybrid engine in a hybrid engine, the vehicle's interior space can be optimized, and costs can be reduced.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve train (100) for a hybrid engine, characterized in that, The application relates to a valve (10) and a valve spring (11) arranged on the valve (10), wherein the valve (10) extends in an axial direction; a valve drive group, which comprises a camshaft (12) and a tappet (20) arranged between the cam and the valve (10), and the camshaft (12) is in abutment with the tappet (20). The tappet (20) comprises an outer shell (21) and a valve fixing pin (22), the camshaft (12) is in abutment with the outer side of the outer shell (21), the valve fixing pin (22) is arranged on the inner side of the outer shell (21), and the valve fixing pin (22) is arranged in axial opposition to the valve (10), and the valve (10) passes through the valve fixing pin (22). The tappet (20) further comprises a base (23) and a plunger (24), the plunger (24) is in abutment with the valve (10) in the outer shell (21), the base (23) is arranged between the plunger (24) and the outer shell (21), and a high-pressure oil cavity (201) is formed between the plunger (24) and the base (23), and a low-pressure oil cavity (202) is formed between the outer shell (21) and the base (23) and / or the plunger (24).

2. The valve train (100) for a hybrid engine according to claim 1, characterized in that The tappet (20) further comprises a first elastic member (25), an abutment member and a one-way conducting assembly, the first elastic member (25) is in abutment between the base (23) and the plunger (24), the abutment member comprises a containing portion (261) and a connecting portion (262), the containing portion (261) is arranged on the inner side of the first elastic member (25), and the connecting portion (262) is in axial abutment between the first elastic member (25) and the base (23); 3. The valve train (100) for a hybrid engine according to claim 2, characterized in that The one-way conducting assembly is arranged in the containing portion (261), the base (23) is provided with an opening (203) communicating the high-pressure oil cavity (201) and the low-pressure oil cavity (202), and the one-way conducting assembly can openably seal the opening (203).

4. The valve train (100) for a hybrid engine according to claim 3, characterized in that The containing portion (261) is in a cylindrical shape, the top periphery of the containing portion (261) is connected with the connecting portion (262), the connecting portion (262) extends in an arc shape away from the containing portion (261), the one-way conducting assembly comprises a one-way valve (271) and a second elastic member (272), one end of the second elastic member (272) is in abutment with the one-way valve (271) in an axial direction, the other end is in abutment with the inner bottom wall of the containing portion (261), and the one-way valve (271) is in axial opposition to the opening (203). The tappet (20) further comprises a baffle (28) and a retaining ring (29), the baffle (28) is sleeved on the outer peripheral wall of the plunger (24), the outer peripheral wall of the plunger (24) is provided with a groove, one part of the retaining ring (29) is arranged in the groove, and the other part of the retaining ring (29) protrudes from the peripheral wall of the plunger (24) to be in axial opposition to the baffle (28).

5. The valve train (100) for a hybrid engine according to claim 4, characterized in that ​ 6. The valve train (100) for a hybrid engine according to claim 3, characterized in that, ​ 7. The valve train (100) for a hybrid engine according to any one of claims 1-6, characterized in that, Also included are a valve lock block (40) and a valve spring seat (50), the valve lock block (40) is provided on the valve (10), the valve (10) is provided in the valve spring seat (50).

8. A gas distribution mechanism (1000), characterized in that, The valve mechanism (100) comprises a plurality of valve mechanisms (100), the plurality of valve mechanisms (100) are the valve mechanisms (100) according to claims 1-7, at least one of the plurality of valve mechanisms (100) is used for intake, and another is used for exhaust.

9. A hybrid engine characterized by, The valve mechanism (1000) according to claim 8 is included.

10. A vehicle characterized by comprising: The valve mechanism (1000) according to claim 9 is included.

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